Fiat Panda Key Fob Replacement
Fiat Panda keyfobs are equipped with a transponder, which sends a signal from the fob to the car that allows it to unlock doors or turn on the motor. However, the fob could not function due to a variety of reasons.
A dead coin battery is the most frequent cause of a key fob malfunction. Other reasons include water damage, an inoperative receiver module and signal interference.
Dead Coin Battery
If the battery in your key fob has gone out of service, the first step is to replace it. Use a brand new button battery that is identical in size, voltage and specification as the old one.
If the key fob was exposed to water (such as rain or saltwater at the beach) It must be cleaned before using again. The best way to do this is using the paper towel and soak it in isopropyl or an electronic cleaner.
If the key fob hasn't been exposed to water but remains inoperable, there may be an issue with the receiver module or an internal electronic chip. In these cases it is possible to re-programme the key fob using an OBDII scanner may help.
Water Damage
If your key fob has gotten submerged in a puddle or pool, or taken a trip down the wash machine, you might have some water damage. You can usually get it working again by taking off the battery and then scrubbing the circuit board with isopropyl alcohol. It's best to let the circuit board completely dry before installing a battery.
You could have a damaged module in the event that your remote stops working after replacing the battery or replacing it with. You can find reprogramming instructions for the majority of vehicles' remote key fobs on YouTube or in your owner's guide. You can also reset your computer of your car using the OBDII scanner tool.
Faulty Receiver Module
The key fob has an electronic chip that communicates with the vehicle's system. If this chip becomes damaged, it will be unable to longer be able to send or receive signals to the vehicle. Dropping G28 Car Keys could cause this, as can exposure to water. If your key fob isn't working due to water exposure and you are unable fix the issue if you clean the chip using electronic cleaner or isopropyl alcohol.
If the key fob won't respond to cleaning, it's possible that the module has an issue and should be replaced. A damaged receiver can cause the key to not work. This is often caused by electromagnetic interference.
Faulty Electronic Chip
The electronic chip in the key fob is an essential component of the anti-theft systems in your vehicle. It sends a signal to the immobiliser inside your car to inform it whether the key is genuine. The car won't start if the chip is damaged.
A damaged chip could be caused by interference from other objects, bad weather or transmitters near your vehicle. In this situation you'll need an entirely new key fob.
Contacts with the battery may be damaged.
The battery contacts inside a key fob are very delicate and could be damaged when used for long periods of time. If they're broken or bent, the fob will not send any signals to the receiver modules in the car.
Modern fobs come with rubber seals that block out water. Submerging them in water, even if just the slightest splash or drizzle could harm the chip's electronic components.
The key fob is equipped with an electronic chip that communicates with the immobilizer system of the vehicle to start it. This system uses crypto coding systems in vehicles that are more modern or the red key system in older ones. This chip will need to be replaced if malfunctioning.
The 12 Volt Battery is faulty
A damaged battery could cause the key fob not to work. The car's computer may not recognize the remote when this happens.
Before replacing the battery, test it with an voltmeter for determining its capacity. A fully charged battery should display 12.6 volts. If the reading decreases significantly then it's time to replace it.
Put an electrical load for a few moments on the battery to determine its capacity. This will take away 1percent of the surface charges. Then, you can measure the voltage once more. The longer the battery can keep its voltage steady, the better its capacity. Ideally, it should remain close to 12 volts several minutes.
Faulty Radio Signal
This is the most common reason for the key fob not sending signals to cars. The battery can be replaced to solve this issue. It is crucial to buy a battery with the same voltage and dimensions as the original.
Fobs are subject to a lot of abuse, but they're also not impervious to destruction. The battery buttons and contacts are brittle and can be bent or damaged from excessive use.
The signal could also be affected by other objects or transmitters who use the same frequency. For instance, a light control panel in your home could send interference on the same frequency as key fobs use. This could interfere with the remote control of your car.
Incorrect OBDII scan tool
There are a number of reasons why a scanner could not work. Some are more complex than others.
Professional scan tools enable mechanics to observe the car's network and perform various self-tests. These tools can save a lot of time, but they are costly and not accessible to the majority of DIYers.
If your OBD2 scan tool fails to turn on, check voltage at the terminals 16 (scantool power) and 4 (chassis earth). If both are in good condition, it's likely that a fuse is blowing. This is among the most common causes of scan tool failure. The easiest solution is to replace the fuse that has been blown.